The co-creator of The Inbetweeners, Damon Beesley, has confirmed that there will be a sequel to the 2011 blockbuster, which saw four adolescent boys head off on a debauched holiday in Greece.

Based on the Channel 4 TV series and costing just £3.5m to make, the big-screen adaptation became the UK's highest-grossing British-made comedy of all time with a £45m haul, and has also inspired a US TV version. Beesley and his co-writer and co-executive producer Iain Morris had previously told the Guardian that talk of a follow-up was "premature" but said on Tuesday they had been working on storylines.

"I don't want to give too much away at this stage but we have been developing an idea for a sequel," Beesley told the Sun. "We miss working with Simon, Joe, James and even Blake too much not to give it a go."

Morris later added, via Twitter: "Yes, but it's far from signed and like Damon said we want to make sure we have a good enough story to tell."

The Sun's report suggests each of the film's four main stars – Joe Thomas, James Buckley, Simon Bird and Blake Harrison – could receive £2.5m to star in the follow-up. It also reiterates suggestions made last year by the Mirror that the sequel might centre on a stag do for Blake Harrison's character Neil.